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A teacher is under investigation for a fight with a student that was caught on camera at Santa Monica High School. Beverly White reports for the NBC4 News at 11 p.m. on Friday, April 4, 2014. (Published Saturday, April 5, 2014)

A Santa Monica High School teacher and wrestling coach caught on cell phone videos fighting with a student Friday was placed on leave pending an investigation into the incident, the school district superintendent announced.

According to a letter sent to parents by Santa Monica-Malibu Unified School District Superintendent Sandra Lyon, no one was injured in the classroom confrontation between teacher Mark Black and a student whose name has not been released.

"We really don't want teachers putting their hands on other students,” the superintendent said. “We really want everyone to act in a way that keeps each other safe."

Based on what she has seen, the “physical restraint” used by the teacher was “unacceptable,” Lyon wrote.

A Santa Monica police spokesman declined to comment on the incident and instead referred questions to the school district.

“We have been in contact with the student's family, and we will work with them to offer the support that they may need,” Lyon wrote. “I am grateful that there is no reported serious physical harm to students or teachers, but that neither dismisses the severity of this situation nor my commitment to gather all the facts and make sure the proper actions are taken.”

Students claim Black confronted their classmate about alleged illegal activity.

"The little boy was selling drugs in class," said Kylan Townsend, a student. "The wrestling coach told him to stop ... I guess he didn't listen and tables were thrown. They started fighting."

"The kid said like, 'Hey, get off me,'" said student Sam Wittert. "And he pushed the coach. And the coach, like, pushed him up against the wall."